These are just a few quick thoughts as it's hard to know without seeing the data. You want a time period comparison by running total, correct? You could start by placing [Period Number] on the rows shelf, YEAR(Date) on the columns shelf, and then whatever metric you are comparing on the Text Marks card? This would show the amount per period per year. You could then right click on your metric and select "Quick Table Calculation" and "Running Total". Lastly, you would right click on the metric again and select "Edit Table Calculation" and click the box for "Add Secondary calculation", then pick "Difference from" to get the year over year change.
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